Hay baler cam actuated hay retaining dogs



Oct. 12, 1954 B. NIKKEI. 2,691,340

HAY BALER. CAM ACTUATED HAY RETAINING DOGS oct. 12, 1954 B L NIKKEL 2,691,340

HAY BALER CAM ACTUATED HAY RETAINING DOGS Filed April 19, '1950 2 Sheets-Sheet 2 ATTE RN EVS Patented Oct. 12, 1954 @pF-.Flach Benjamin-L.rNikkel, `Windeln, LApplicationApril I8, 1950"'Serial'NoJlEBHS a4 Glams. 21

lThis invention relates to -devices AYfor holding hay for tying in hay baling machines land `in particular to cam actuated -dogs 4positioned to extend 'through the pathk of hay compressed in a `haybaling machine wherein'l thefeam-Or Yactuating 1the dogsisdri-ven from'fthefeccentric or crank Yshaft of the'baler.

The `purpose 4of this invention is -to provide means in 7a hayfbaling machinefor fantomatica]- l-y gripping rand holding thehay after vvthe vhasr is compressed by va plunger after the plunger vis Withdrawn whereby the compressed hay yis "retained finpositionfor tying.

In v"the conventional hay "paling Amachine 'the Wiresfor ftying 1the bale are placed through .slots inthe 'facefof -a plunger and as the plunger moves With acontinuous aotionit `is necessaryto run the AWires 4through'the `slots `at the instant the plunger arrives at'theend ofthe vcompression stroke, 'With this thought in `mind thisinvention contemplates a vpair of spaced-hay retainingfdogs pivotally mounted 'to extend `into the trough of a hay baling Amachine :wherein the dogs are @actuated by :acam shaped tofmovefthe 'dogsinto the troug'has the-'hay -balingplunger reaches the end of 4 the 'stroke awhereby 'thefhay isfheld byfthedogs as'the plungerrrecedes.

vTheobject .of this .invention is, therefore, -to providemeans in-a hay baling machine for .-automatically lactuating vhay yretaining dogs Yfor -retaining hay 'in a Loompressed 'position' in :which the movement-of theI dogs maybe timed to .fcorrespond `with the 'travel of thelplunger.

4ilfino'ther"object .of `the invention is .tozprovide retaining means.. in 1a hay zbaler for holding `hay initying as the f-hay: is sreleased vby-ta plunger. that may be incorporatedzn: hay `:loalers 1now :in use.

Afurther :object of :the inventionis to .provide glilhayibaler having cam=actuated dogs therein for 'holdingthe Vhay :compressed lley a Yplunger as 'the hayistied-iwhichis .of a simple and economicall construction.

With A[these-'and other .objects andf'advantages in 'view the 1 invention embodies a :hay .baler having an elongated rectangularzshaped trough with a reciprocating :plunger slidably lmounted therein and actuated by a crank shaft, andra pairfof '-'dogs'pivotally *mounted in the upper part of `:the trough and positioned -to be :actuated fby ma cam whereby lthe. dogs move downwardly intothe trough 4for holding-a3 bale ofhay therein.

Other :features =andaiadvantages of :the :invention will eappear 'from f the following description tskemincconnectionawith theiirawingsrwherein:

(Cl. '10D-.1187) Figure 1 is a longitudinal `section through a hay vbaler with the hay retaining dogs shown in the upperfor out ofthe Way position.

lFigure 2 is afsimil-ar'view showing the plunger at the -end of the `compression stro-ke -and also showing the dogs flowered to the'ihay retaining position.

-FigureB is asimilar-view showingthe plunger returned and the dogs in the vhaygripping positi-on.

Figure 4 is a similar view illustrating .iafurther .step in which the plunger Iis -startingfor- Ward fand'thef dog-s are in the rupper lposition.

Figure f5 is a planuview ofthe fhayi'ba'lerzwith parts =broken away-and parts shown in'isection illustrating the means for driving the yshat Aon which the cam `that `operates .thesdogs is positioned frornnthe crankshaft of the'baler.

"Figure 6 is. a cross section through :the vbaler taken on linefB-S of Figured, showing .the-slots inthe :face of fthe plunger '.throughwhichfthe tying .Wires are extendedand falso through-Which theshay.v retaining dogs `are actuated.

Figure i7 islan elevational'view with 'parts'broken away andsh'own in section illustratingthe shaft'by which the `clogs are .pivotal-ly rmounted in the baler.

.-'Figure T8 .is an end elevational .vieiaveshowing they shaft, dogs, and hearing Ifor `mount-ing 1the shaft in the baler.

.Figure 9 is .a detail yillustrating'the mounting of the .dog Acarrying shaft rin the lupper part :of the .balen `AReferringnow tothe `drawings `wherein like reference "characters 'denote :corresponding parts,

the improved'hay balerxof this machine. is provdedfwitha cam isfor 'operatingzthe dogs lfl and l2 for Yholding hay .compressed .by `a Aplunger 1.3 .in a trough having a base .plate .1| 4, an upperrplate I5 and .side fplates L:Iian'd 1H.

The cam Ifis xedlymounted on a .cam shaft 'i8 'that is journaled inbearings [9 and i2@ .on angles :'2I and A$.22 at Ithe upper corners :.ofiithe trough andthe camshaft-is rotated lfrom-a tractor, motor, or other driving means vfrorn a crankshaft f3l which is driven lby =a 'belt z:fromthe driving means, Awith the rcrankshaft Idriving a cam shaftby an `intermediate .shaft in :a ftubeZ i, the Acam yshaft having-a .beveledgear 124 :thereon `that lmeshes vwith a gear'25 on lthe :shaft .rex-

tended.` through the elongated bearing @tube L25 that is positioned yon the side of vlthe trough. Bearing tube'ZBais 'supported'.bybrackets'z'l :and 28 and the shaft therein isdrivenby: a.:-beve1ed .gear 29 what emeshesiwith assimile-r `:gears 30:10u

the crank or eccentric shaft 3l that actuates the plunger through a connecting rod 32. rThe gear 24 is operatively connected to the cam shaft I8 by a clutch 23.

The crankshaft 3| is driven by a pulley 33 on an axle 34 through gears 35 and 36, the axle 34 being journaled in bearings 31 and 38 in a gear housing $38 on the baler frame and the crankshaft 3i being connected to the connecting rod 32 by a bearing 39, the opposite end of the connecting rod being pivotally attached to the plunger through a Wrist pin 40.

The dogs i! and i2 are xedly mounted on a jack shaft 4I and the shaft di is pivotally attached to the upper plate I by bearing elements 42 and 43 with the bearing elements secured in position by bolts 44 and 45, respectively. The bolts are provided with nuts t3. The bearing elements are provided with arcuate shoes t? and 48, respectively which extend around the shaft. The shaft is provided with an arrn i9 which is connected by a link 50 to a lever 5I of a crank or rocker shaft 52, the opposite end of which is provided with an arm 53 on which a roller E3 that extends into a groove 55 of the cam iii is positioned. No means of adjustment is provided between the parts til, 50, 3i and 53, as it is not necessary to change the angular relationship between these parts. The rocker shaft 52 is journaled in a bearing 5t on the side of the bearing stand I9.

The dogs H and i2 are positioned to register with wire tying slots 5i and 58 in the face of the plunger I3; and angles 5e, tt and 6| are positioned on the face of the plunger between the slots.

With the plunger in the position illustrated in Figure 2 the dogs ii and l2 extend downwardly in the slots to engage the surface of the hay compressed by the plunger and in this position the faces of the dogs are in a plane corresponding with the face or end of the plunger.

A feeding chute or hopper 62 extends from the side of the trough in which the plunger is positioned as illustrated in Figures 5 and 6.

The pulley 33 of the baler as previously stated may be driven from a pulley on a tractor, or from a motor, or other suitable driving means by a belt S3 and the plunger is reciprocated by the crank shaft 3i through the gears 35 and 3S. The crank shaft is journaled in bearings B6 and 35 on the sides of the trough or baler.

The groove -55 of the cam i0 is shaped whereby with the plunger approaching the forward position as illustrated in Figure 1 the dogs il and l2 are raised to positions above the trough and as the plunger starts back from the extreme position at the end of the stroke as shown in Figure 2 the roller 5t passes into the semicircular section of the cam with the dogs moving downwardly to the position shown in Figures 2 and 3 with the roller held in the semi-circular section of the groove of the cam the dogs will remain in this position for substantially one half of a revolution of the shaft it, in which movement the plunger is withdrawn to the opposite end of the stroke. At this time the roller 5S passes into the oppositely disposed interrupted arcuate portion of the groove of the cam Wherein the dogs are elevated to the position shown in Figure 4 and the carn holds the dogs in this position until the plunger again approaches the dogs, as illustrated in Figure l, from which position the cycle is repeated.

, By this means the hay retaining dogs H and I2 move downwardly through the end of the plunger with the plunger in the extreme position or at the end of its compression stroke, and at this time the dogs are actuated downwardly through the end of the plunger to the position shown in Figures 2 and 3.

With the parts arranged in this manner hay fed to the trough of the baler is compressed by the plunger and when a predetermined amount of hay has been compressed to form a bale the clutch 23 is actuated by the trip rod Sii so that at the end of the next stroke the dogs hold the hay so that the hay may be tied as the plunger is Withdrawn. After the bale is tied the next movement of the plunger drives the bale to the next position in the trough with the bale formerly occupying this position being discharged from the end of the trough.

It will be understood that modifications may be made in the design and arrangement of the parts without departing from the spirit of the invention. A

What is claimed is:

1. In a hay baler having a frame, the combination which comprises an elongated trough, rectangularly shaped in cross section, a plunger slidably mounted in the trough, a crank shaft journaled on the sides of the frame, a connecting rod connecting the plunger to the crank shaft, and a jack shaft journaled in the upper part of the trough, dogs carried by the said jack shaft, a transversely disposed cam shaft journaled on the trough, a cam carried by one end of the cam shaft, said cam having a cam groove with a substantially semi-circular section and also a relatively straight section therein, a rocker shaft journaled on the trough, an arm extended from one end of the rocker shaft and having a roller thereon extending into the cam groove, means actuating the said jack shaft with the dogs thereon by the rocker shaft whereby the dogs are actuated to positions in the path of a bale of hay being compressed by the plunger in --the trough, and means driving the cam shaft from the crank shaft whereby the cam actuates the jack shaft through the rocker shaft. -r

2. In a hay baler, the combination which comprises an elongated frame, rectanguiarly shaped in cross section a plunger slidably mounted in the frame, a crank shaft journaled on the sides of the frame, a connecting rod extended from the crank shaft to the plunger for actuating the plunger, said plunger having spaced slots in the face thereof, a jack shaft journaled on the frame, dogs carried by the said jack shaft and positioned to register with the siots in the face of the plunger, a cam shaft journaled on the frame and positioned above the jack shaft, a cam having a cam groove with a substantially semi-circular portion and an interrupted arcuate portion therein mounted on the cam shaft, and a rocker shaft having a lever on one end and an arm on the other for actuating the jack shaft with the dogs thereon by means of the groove of the said cam.

3. in a hay baler, the combination which comprises an elongated frame, rectangularly shaped in cross section a plunger slidably mounted in the frame, a crank shaft journaled on the sides of the frame, a connecting rod connecting the plunger to the crank shaft, said plunger having spaced slots in the face thereof, a jack shaft journaled in the upper part of theA frame, dogs carried by the jack shaft and positioned to register with the slots of the plunger, said dogs being mounted to extend downwardly in the frame, a cam shaft positioned above and journaled on the said frame, a cam having a cam groove with a substantially semi-circular portion and an interrupted arcuate portion therein carried by one end of the cam shaft, a rocker shaft having an arm with a roller on the end thereof extending from one end and an arm extending from the opposite end, said rocker shaft positioned Whereby the roller on the end of the arm on one end thereof extends into the cam groove, and means operatively connecting the arm extending from the opposite end of the rocker shaft to the jack shaft for operating the jack shaft and dogs carried thereby, and means adapted to rotate the cam.

4. In a hay baler, the combination which comprises an elongated frame, rectangularly shaped in cross section, a plunger slidably mounted in the frame, a crank shaft journaled on the sides of the frame, a connecting rod connecting the plunger to the crank shaft, said plunger having spaced slots in the face thereof, a jack shaft journaled in the upper part of the frame, spaced dogs carried by the jack shaft and adapted to be positioned to extend into the frame and also adapted to be positioned to extend into the slots in the face of the plunger, an arm extending from said jack shaft, bearings extending upwardly above the frame, a cam shaft journaled in the upper ends of the said bearings, a cam having a continuous cam groove in a face thereof carried by the cam shaft a rocker shaft journaled on said bearings, an arm extended from one end of said rocker shaft, a roller journaled on the end of said arm extending into the cam groove, said rockershaft having a lever extending from the end opposite to the end from which the arm with the roller thereon extends, a link connecting the lever extending from the rocker shaft to the arm extending from the jack shaft, and means rotating the cam by the crank shaft of the baler.

References Cited in the le of this patent UNITED STATES PATENTS Crumb Aug. 13, 1946 

